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Full text of "Practical Organic Chemistry"

AZOXYBKNZENK

almonds; 1>. p. 206  207, sp. gr.  I'2o8 at  15; m. p. 3*;
soluble in water, soluble in alcohol, ether, and benzene.

A'cui'/to//.  Pour a drop of nitrobenzene into a test-tub^ with

1  c.c. water and i c.c. glacial acetic acid.    Adda little zinc-dust
on the point of a penknife, and warm for  a  minute.    Dilute
with a few c.c. of water,   and add caustic soda solution until
alkaline, and pour a few drops into a test-tube half filled with
sodium  hypochlorite   solution.     A   violet  colouration,   which
gradually  fades,   is  produced, due to the presence of aniline
(see p. 150).    See Appendix^ p. 274.

P REPARATION    49.

Azoxybenzene,  CWN -- N .C(JHfj
\0/

Klingcr, /?<v., 1882, 15, 865.

200 grins, methyl alcohol
20     ,,     sodium.
30     ,,     nitrobenzene.

Attach an upright condenser to a round flask (J, litre).    Pour
in  the methyl alcohol and  add   the sodium  in   small   pieces,

2  3 grams at a time.    A good stream of water should pass
through the condenser,  but  otherwise  the   flask need not be
cooled.    When the sodium has dissolved, the nitrobenzene is
introduced, and the mixture boiled on a water-bath three   to
four hours.    The methyl  alcohol  is   then   distilled   off in   the
water-bath.    As  the   liquid   is   liable  to  bump,   owing   to the
separation of solid  mailer, it  is advisable to add a few bits of
pot.    When no more alcohol distils, the residue is poured into a
beaker of water and rinsed out. A. dark-coloured oil is deposited,
which soon solidifies, and is then washed by decantation, and
pressed on a porous plate.     Yield about 23 grains.     It is re-
crystallised, when dry, from ligrom, in which it is rather soluble.

1-311,0.
crtics* Yellow   needles ;    in. p.   36 .    vSee   Appendix*